Towards a unified model of stellar rotation II: Model-dependent characteristics of stellar populations

Rotation has a number of important effects on the evolution of stars. Apart from structural changes because of the centrifugal force, turbulent mixing and meridional circulation caused by rotation can dramatically affect a star's chemical evolution. This leads to changes in the surface temperat...

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Bibliographic Details
Published in:arXiv.org 2012-04
Main Authors: Potter, Adrian T, Tout, Christopher A, Brott, Ines
Format: Article
Language:English
Subjects:
Abundance
Anomalies
Astronomical models
Centrifugal force
Chemical evolution
Computer simulation
Formulations
Luminosity
Organic chemistry
Star & galaxy formation
Stellar evolution
Stellar populations
Stellar rotation
Turbulent mixing
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Summary:Rotation has a number of important effects on the evolution of stars. Apart from structural changes because of the centrifugal force, turbulent mixing and meridional circulation caused by rotation can dramatically affect a star's chemical evolution. This leads to changes in the surface temperature and luminosity as well as modifying its lifetime. Observationally rotation decreases the surface gravity, causes enhanced mass loss and leads to surface abundance anomalies of various chemical isotopes. The replication of these physical effects with simple stellar evolution models is very difficult and has resulted in the use of numerous different formulations to describe the physics. Using stellar evolution calculations based on several physical models we discuss the features of the resulting simulated stellar populations which can help to distinguish between the models.
ISSN:2331-8422
DOI:10.48550/arxiv.1204.1973